The working principle of car horn
Automobile electric horns produce sound by the vibration of the metal diaphragm. Automobile electric horn is composed of iron core, magnetic coil, contact, armature, diaphragm and so on. When the driver presses the horn switch, the current flows through the coil through the contact. The coil generates magnetic force to attract the armature to force the diaphragm to move. The armature moves to disconnect the contact, the current is interrupted, and the magnetic force of the coil disappears. Under the action, it returns to the original position together with the armature, the contact closure circuit is connected again, and the current flows through the contact through the coil to generate magnetic force, and the above action is repeated. In this way, the diaphragm keeps vibrating and generates sound. The sounding board and the diaphragm are rigidly connected, which can make the vibration smooth and make the sound more pleasing (that is, the principle of electromagnet).
